A Hazy Outlook over the North China Plain

Beijing, the cultural and political capital of China, is home to a massive population of almost 25 million people has long been known for its air pollution. A team of scientists at Peking University in Beijing looked at the chemistry of the city’s haze and found something surprising: the inorganic mass fraction, normally dependent on only human activities, increased with increasing relative humidity. That’s right: how bad anthropogenic emissions actually are depends on the weather. Exploring this trend will help us to understand how haze forms, which could help Beijing and other major cities to manage their air pollution problems more effectively.

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